Loom stopping means



May 31, 1949. sz o ETAL 2,471,845

- LOOM STOPPING MEANS Filed Feb. 24, 1947 EDWARD J SZABO 8 PAUL 'W.CHR/STLEY INVENTORS 32 LWX 15.

ATTOR N EY Patented May 31, 1949 j LOOM STOPPING MEANS Edward J. Szaboand Paul W. Christley, Cleveland, 'Ohio, assignors to Industrial RayonCorporation, Cleveland, Ohio, a corporation of Delaware ApplicationFebruary 24, 1947, Serial No. 730,238

This invention relates to looms and, more particularly, to means forstopping a loom upon the occurrence of a filling failure.

Looms are generally provided with a mechanical stopping means in theevent of a filling failure, and an electric stop motion in the event ofa warp end failure. The mechanical fillin failure detecting and loomstopping means comprises a filling fork feeler device and an associatedmechanism which cooperate to displace the loom shipper handle out of itsoperating position into a loom stopping position. Due, however, to thevibration of the loom, and the wear of the feeler device and associatedparts, the mechanical stop motion occasionally fails to operate to stopthe loom, which will continue to function until it is manually stoppedby an operator. It is, of course, desirable to prevent such a conditionfrom happening.

This invention advantageously provides a sup plementary filling failureloom stopping means. It is an electrically operated loom stopping meanswhich is actuated by separated warps whose separated condition is due tothe lack of a filling or because of the failure of the filling. Thisadditional stop motion insures the stoppage of a loom in the event of afilling failure irrespective of the operating condition of themechanical stop motion.

Generally, the electrical filling stop motion of this inventioncomprises a single lead low voltage circuit that is grounded to the loomframe in which a filling detector is positioned. The detector is adaptedto close the electrical circuit when a filling failure occurs,energizing a solenoid whose armature actuates an associated mechanismwhich is adapted to stop the loom by dislodging the shipper handle fromits operating position. The shipper handle, when dislodged, also isadapted to throw open a switch in the circuit as a precautionarymeasure. The loom stopping, filling detector is advantageously maderesponsive to warps that are separated because of the lack of a filling.The loom harness, in the normal course of op eration of the loom, isadapted to spread the warps to permit a shuttle carrying a fillingmaterial to traverse the loom. The normal length of the spread is, ofcourse, equal to the distance between the harness and the position ofthe last filling.

This distance will become longer should there be Claims. (01. 139-348)no filling material at the usual position. Then,

as the spread warps move inthe loom this spread condition willsubstantially immediately close the detector of the loom stop motionwhich is advantageously positioned just above the moving rentconducting, cross-head 30.

material at about the point of the last filling. The

detector is advantageously positioned at about the end of the forwardstroke of the lay, or, under normal conditions, at about the lastfilling position.

The filling failure stop motion will be described in greater detail inthe following specification taken in connection with the accompanyingdrawing where:

Figure 1 represents a filling detector in a normal inoperative position;

Figure 2 represents the filling detector in a circuit closing position;

Figures 3 and tshow the detecting device in greater detail, in plan andsectional elevation,

respectively; and

Figure 5 represents an electric stop motion circult in which thedetector is positioned.

In the drawing there are shown only such parts of the loom as arenecessary for a complete understanding of the invention. Referring toFigure 1 of the drawing, there is shown in section a breast roll ill,over which a woven material ll, composed of at least two warps it andit, and a filling I5, is adapted to pass. On a breast beam H andextending inwardly of the loom there is a loom stopping, fillingdetecting device 20 which is responsive to any lack of filling betweenthe warps.

The loom stopping, filling detector 20 comprises a suitably curvedcurrent conducting tubular arm 2! which is supported in a clampingarrangement mounted onthe breast beam ill. The tubular arm. may suitablybe made of ordinary iron tubing or of any other current conductingmaterial. The means for holding the arm 2| may suitably consist of atubular clamping section 22 having a wing stud 23 in its side adapted tobear against the tubular arm 2|. The tubular clamping section 22 is,further, attached by means of another stud l9 to an angular, currentconducting supporting member 24 which is bolted. or otherwise secured tothe breast beam H, such as by means of a bolt 25. The angular,supporting member 24 may be desirably slotted to permit the adjustmentof the arm 2|, relative to the passing woven material H. v

The tubular arm 2|, as shown in Figure 3, is advantageously bifurcatedat one end. The diverging sections 21, 28, forming the bifurcation, haveattached to them by means of studs 29 a substantially rectangular,bottom opening, our- Further, as

' shown in Figure 4, the head 30 encloses a contact strip 3| which isembedded in the top of an insulating bar 32 which is positioned adjacentthe moving material H. Further, the insulating bar 32 is positioned inthe cross-head 30 in such a manner as to be freely movable between itsrest position and the upper part of the head 30.

To the contact strip 3l there is attached a lead wire 33 The lead wire33 desirably extends into and through tubular arm 2| and through aninsulating end plug 34 to join, as diagrammatically shown in Figure 5,the loom stopping circuit. To permit the inspection of the point ofattachment of the lead Wire 33 to the contact strip 3| there is providedan opening 35 in the top of the cross-head 30.

Because of the adjacent position of the bar 32 to the woven material,the bar 32 is adapted to be raised by warp that has become separatedbecause of the lack of filling. Upon being lifted by the separated warpthe bar 32 effects contact of the head 30 with the contact strip 3i, toenergize the loom stopping circuit in a manner to be hereinafterdescribed. a v

The circuit of Figure 5 of which the detector of this invention is apart is a low voltage circuit, e. g. about 12 to 14 volts, which isgrounded to the loom. The circuit includes, in addition to the detectorherein described, a switch 39 which is operable by the loom shipperhandle and a solenoid 36 whose energized armature 31- is adapted toactuate a member 38 which with other associated mechanism (not shown) isadapted to dislodge the loom shipper handle. The circuit becomesenergized when the open warp raises the contact strip 3| into contactwith the cross-head 30. The solenoid armature 31 is adapted to actuatethe member 38 which in turn actuates an additional suitable associatedmechanism to dislodge the loom shipper handle to stop the loom, and toopen the circuit switch 39. Power for energizing the circuit is derivedfrom a transformer 40 which transforms the shop circuit to one of about12 volts.

Further, the non-conducting bar 32 of the detector is advantageouslymade of such a width so as to contact a plurality of warp ends. By beingresponsive to a plurality of raised warp ends assurance of a positivecontact between the head 30 and contact strip 31 is had. Also, by being.

positioned substantially at the point 'of the final position of afilling as determined by the forward stroke of the loom lay, the device20 is substantially immediately responsive to a filling failure inasmuchas the open or divergent warps at once raise the bar 32 which liftsstrip 3| into a contact with the head 30 to close the circuit. There isthus provided by this invention a positive acting and sensitive contactdevice which is advantageously adaptable to looms for effecting theirstoppage in the event of a filling failure.

We claim:

1. The combination of a loom, an electric stop motion circuit in saidloom, a detector in said electric stop motion circuit positionedtransversely to the warp of said loom and substantially at the fell,said detector energizing the electric stop motion circuit when actuatedby a separated warp continuing beyond the position of the detector.

2. In an electric loom stop motion circuit a ML ing detector comprising,means sensitive to the continuing separation of warp due to lack orfilling, said means being positioned adjacent to the warp andsubstantially at the fell, a circuit closing device, said means beingadapted when raised by the separated warp beyond the position of thedetector to close said circuit closing device.

3. In combination, a loomyan electric stop motion in said loom, afilling detector in the circuit of said electric stop motion positionedtransversely of the warp of the loom being responsive to the separationof warp due to the lack of filling, said detector comprising, a headcomposed of current conducting material, a contact element in said head,a non-conducting member in said head supporting said contact element,said non-conducting member extending outwardly of said head to adjacentthe warp so as to be actuated by the separated warp to thereby raise thecontact element into contact with the detector head to close the circuitof said loom stop motion.

4. In combination, a loom, an electric stop motion circuit in said loom,a device adapted to close the electric circuit of said electric stopmotion comprising, an adjustably positioned metallic member positionedon and grounded to said loom, a metallic head on one end of said memberbeing positioned transversely to the direction of warp passing in saidloom, a bar of non-con ducting material in said metallic head positionedadjacent to and above the warp, a metallic contacting strip on saidnon-conducting bar, a current conducting lead joining said contact stripto said electric loom stop motion circuit, said non-conducting bar beingadapted to be raised by the separation of warp due to the lack offilling to thereby efiect contact between said contacting strip and saidmetallic head to energize the loom stop motion circuit to stop the loom.

5. In a loom stop motion circuit. a filling detector positionedtransversely to the direction of warp moving through the loomcomprising, an arm of current conducting material having a bifurcatedend, means of current conducting material for adjustably supporting saidarm, said supporting means being positioned on the loom frame, across-head of current conducting material attached to the bifurcatedends of said arm.

a non-conducting vertically movable bar in said I cross-head beingadapted to be positioned above the moving warp, a contact strip in thetop of said non-conducting bar, said contact strip being adapted tocontact said cross-head when said non-conducting bar is raised by warplacking a filling, and a conductor joining said contact strip tosaidloom stop motion circuit.

EDWARD J. SZABO. PAUL W. CHRIS'I'LEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

